Abstract:
A semiconductor apparatus includes a first substrate (102, 202) and a second substrate (106, 206) located over a first portion of the first substrate and separated from the first substrate by a buried layer (104, 204). The semiconductor apparatus also includes an epitaxial layer (108, 220) located over a second portion of the first substrate and isolated from the second substrate. The semiconductor apparatus further includes a first transistor (116) formed at least partially in the second substrate and a second transistor (128) formed at least partially in or over the epitaxial layer. The second substrate and the epitaxial layer have bulk properties with different electron and hole mobilities. At least one of the transistors is configured to receive one or more signals of at least about 5V. The first substrate could have a first crystalline orientation, and the second substrate could have a second crystalline orientation.
Abstract:
The present invention discloses a method of forming a local buried layer (32) in a silicon substrate (10), comprising forming a plurality of trenches (12, 22) in the substrate, including a first trench (22) having a width preventing sealing of the first trench in a silicon migration anneal step and at least one further trench (12) connected to the first trench; exposing the substrate (10) to said anneal step, thereby converting the at least one further trench (12) by means of silicon migration into at least one tunnel (16) accessible via the first trench (22); and forming the local buried layer (32) by filling the at least one tunnel (16) with a material (26, 28, 46) via the first trench (22). Preferably, the method is used to form a semiconductor device having a local buried layer (32) comprising a doped epitaxial silicon plug (26), said plug and the first trench (22) being filled with a material (28) having a higher conductivity than the doped epitaxial silicon (26).
Abstract:
A semiconductor device (10) is formed on a semiconductor layer (16). A gate dielectric layer (18) is formed over the semiconductor layer. A layer of gate material (20) is formed over the gate dielectric layer. The layer of gate material is patterned to form a gate structure (20). Using the gate structure as a mask, an implant (24) into the semiconductor layer is performed. To form a first patterned gate structure (20) and a trench (42) in the semiconductor layer (16) surrounding a first portion (28) and a second portion (30) of the semiconductor layer and the gate, an etch through the gate structure (20) and the semiconductor layer (16) is performed. The trench (42) is filled with insulating material (46).
Abstract:
Embodiments disclosed herein include methods in which a pair of openings are formed into semiconductor material, with the openings being spaced from one another by a segment of the semiconductor material. Liners are formed along sidewalls of the openings, and then semiconductor material is isotropically etched from bottoms of the openings to merge the openings and thereby completely undercut the segment of semiconductor material. Embodiments disclosed herein may be utilized in forming SOI constructions, and in forming field effect transistors having transistor gates entirely surrounding channel regions. Embodiments disclosed herein also include semiconductor constructions having transistor gates surrounding channel regions, as well as constructions in which insulative material entirely separates an upper semiconductor material from a lower semiconductor material.
Abstract:
Halbleiteranordnung für einen integrierten Schaltkreis - mit einem ersten Bereich (10) in dem eine Anzahl von Bauelementen ausgebildet ist, mit einem zweiten Bereich (60), - mit einer vergrabenen Isolatorschicht (50, SOI) zur vertikalen Isolation des ersten Bereichs (10), - mit einer Isolationsstruktur (1 ), die zwischen dem ersten Bereich (10) und dem zweiten Bereich (60) zur lateralen Isolation des ersten Bereichs (10) vom zweiten Bereich (60) ausgebildet ist, bei der - die Isolationsstruktur (1 ) eine Grabenstruktur (20, 21, 22, 23, 29) mit einem Dielektrikum und eine Leiterstruktur (30, 31, 32, 33, 39) mit einem Halbleitermaterial aufweist, - die Grabenstruktur (20, 21, 22, 23, 29) an die vergrabene Isolatorschicht (50, SOI) grenzt, und - die Leiterstruktur (30, 31, 32, 33, 39) zur leitenden Verbindung des ersten Bereichs (10) mit dem zweiten Bereich (60) ausgebildet ist.
Abstract:
A method of manufacturing a semiconductor device includes forming trench isolation structures, exposing some of the trench isolation structures 28 to leave others 30 masked, and then selectively etching a buried layer to form a cavity 32 under an active device region 34. The active device region 34 is supported by support regions in the exposed trenches 28. The buried layer may be a SiGe layer on a Si substrate.
Abstract:
A method for forming a portion of a semiconductor device structure (30) comprises providing a semiconductor-on-insulator substrate having a semiconductor active layer (34), an insulation layer (32), and a semiconductor substrate. A first isolation trench (40) is formed within the semiconductor active layer and a stressor material (42) is deposited on a bottom of the first trench, wherein the stressor material includes a dual-use film. A second isolation trench (44) is formed within the semiconductor active layer, wherein the second isolation trench is absent of the stressor material on a bottom of the second trench. The presence and absence of stressor material in the first and second isolation trenches, respectively, provides differential stress: (i) on one or more of N-type or P-type devices of the semiconductor device structure, (ii) for one or more of width direction or channel direction orientations, and (iii) to customize stress benefits of one or more of a or semiconductor-on-insulator substrate.
Abstract:
A method of manufacturing a semiconductor device includes forming trench isolation structures, exposing some of the trench isolation structures 28 to leave others 30 masked, and then selectively etching a buried layer to form a cavity 32 under an active device region 34. The active device region 34 is supported by support regions in the exposed trenches 28. The buried layer may be a SiGe layer on a Si substrate.
Abstract:
The invention provides, in one aspect, a microelectronics device (100) that includes a silicon on insulator (SOI) region (110) located over a microelectronics substrate (115). The SOI region comprises a first dielectric layer (120) located over the microelectronics substrate, a biasing layer (125) located over the first dielectric layer, and a second dielectric layer (130) located over the biasing layer. An active region (135) is located over the SOI region. Contact plugs (140) extend through the active region and within the SOI region. The invention also includes a method for making the microelectronics device.
Abstract:
A method for manufacturing a device including an n-type device and a p-type device. In an aspect of the invention, the method involves doping a portion of a semiconductor substrate and forming a gap in the semiconductor substrate by removing at least a portion of the doped portion of the semiconductor substrate. The method further involves growing a strain layer in at least a portion of the gap in the semiconductor substrate. For the n-type device, the strain layer is grown on at least a portion which is substantially directly under a channel of the n-type device. For the p-type device, the strain layer is grown on at least a portion which is substantially directly under a source region or drain region of the p-type device and not substantially under a channel of the p-type device.